/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraGpuComputeDispatchInterface.h
Get access to Niagara's GpuReadbackManager.
[FNiagaraGpuReadbackManager](API\Plugins\Niagara\FNiagaraGpuReadbackManager) * GetGpuReadbackManager() const